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六十年代初期我省开始引进推广杂交玉米、杂交高粱,经过科技人员和广大群众的努力,到七十年代末期,“两杂”在我省玉米、高粱生产中已居主导地位,显示了强大的增产效益。我省玉米和高粱平均单产由推广杂交种以前的250和200多斤,猛增到现在的500斤左右。但是,近年来一些“两杂”制种基地,忽视制种田的隔离距离,使杂交种子质量大大降低,给生产上造成不应有的损失。出现这种问题的原因一方面是农村实行责任制以来隔离区不好安排,但更主要的是基地技术人员对“两杂”制种田需要设置隔离区的重要性和必要性认识不够。
In the early 1960s, the province began to introduce and popularize hybrid corn and hybrid sorghum. Through the efforts of scientists and the general public, by the end of the seventies, the “two hybrids” have become dominant in the production of corn and sorghum in our province, demonstrating a strong Yield increase. The average yield of maize and sorghum in our province increased from 250 and 200 kilos before the hybrid hybrids to about 500 kilos now. However, in recent years, some “two-hybrid” seed production bases have neglected the isolation distance of farming systems and have greatly reduced the quality of hybrid seeds, causing undue losses to their production. The reason for this problem lies in the fact that the isolation areas have not been properly arranged since the implementation of the responsibility system in rural areas, but more fundamentally, the base technicians do not have enough understanding of the importance and necessity of the establishment of isolation areas for “two-hybrid” farming.